for get-pushed challenge from Lynda to find patterns ... : "Since you appear to be using your cell phone, my challenge is to capture patterns, either natural or man-made. Extra points for incorporating shadows."
Nice find. Agree with @joemuli -- Mother Nature sure knows what she's doing. and Agree with @farmreporter that the shadowing brings out the texture nicely. Only thing I don't like about this image is the bit of writing visible lower right. I find it a bit distracting. Perhaps it could be cloned out?
Nicely done!